"cataracts: 0.5 Gy1,5"
"Deterministic effects describe a cause and effect relationship between ionising radiation and certain side-effects. They are also known as non-stochastic effects to contrast them with chance-like stochastic effects (e.g. cancer induction)."
"There are practical threshold doses below which no significant changes are apparent and these thresholds should never be reached occupationally if sensible procedures are upheld."